Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Lees voor meer informatie dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

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Firefox (84) downloaded an *.mp4 file to Temp. The download folder is set to Desktop, and has been for years. (Yes I checked.)

I could not stop Acrobat Reader from trying, and failing, to open the file. Default program for opening *.mp4 is set to Media Player (Windows Pro 7). (Yes I rebooted after setting.)

Download was from https://www.tribute.co. I had some trouble finding the file in Temp. What went wrong with the download folder and the default opening program? Thanks.

Firefox (84) downloaded an *.mp4 file to Temp. The download folder is set to Desktop, and has been for years. (Yes I checked.) I could not stop Acrobat Reader from trying, and failing, to open the file. Default program for opening *.mp4 is set to Media Player (Windows Pro 7). (Yes I rebooted after setting.) Download was from https://www.tribute.co. I had some trouble finding the file in Temp. What went wrong with the download folder and the default opening program? Thanks.

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Firefox should use your Download folder (or let you choose a folder) if you choose "Save" in the Download dialog. If you choose Open, it always uses the Temp folder. But "Save" should not use the Temp folder; that is hard to explain.

Acrobat getting into the action is even stranger. Is it possible that a .pdf extension got onto the MP4 file somehow? To avoid Windows hiding such oddities from you, you can set Windows to always show file extensions. See: https://www.bleepingcomputer.com/tutorials/how-to-show-file-extensions-in-windows/

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jscher2000, Thank you for your answer. There wasn't a download dialogue, just a download button on the tribute.co website. Everything else I've downloaded, for years, has gone to Desktop. A mystery. There was no PDF in that filename anywhere and I revised the default programs list and checked the applications list in Firefox; Acrobat wasn't the default in either. Another mystery. The *.mp4 probably originated on an Apple computer, but that shouldn't have caused this. I guess there are some things we are not meant to know.

I didn't know about www.bleepingcomputer.com but I do now. Thank you.